His uncle _____ does exercises. It's not good for his health.
sometimes
always
often
seldom
本题考查频度副词的用法。根据题干中的“那对他的健康没有好处”可推断，他的叔叔几乎不锻炼身体，表示“几乎不”要用 seldom，故答案为选项D。